Sending JavaScript Variable to PHP via POST

Question

Is it possible to send the contents of a JavaScript variable to PHP when a form is submitted?

Armel Larcier · Accepted Answer · 2013-12-15 15:51:15Z

3

Yes. Just add a javascript callback to the form submit event

<script type="text/javascript">
    var myglobalvariable = "myvalue";
    onSubmit = function(){
        document.myform.myinput.value = myglobalvariable;  return true;
    }
</script>
<form name="myform" id="myform" method="post" action="index.php" onsubmit="onSubmit();">
    <input name="myinput" id="myinput" type="hidden" />
</form>

answered Dec 15, 2013 at 15:51

Armel Larcier

16k7 gold badges70 silver badges89 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Jamus Over a year ago

Awesome, thanks very much! :) How would I access the retrieved data, though? $_POST['myinput'] doesn't seem to be it :P I can't var_dump on this server.

Armel Larcier Over a year ago

The array key is the name of the input in question. In my example, it'll be 'myinput' but your code doesn't show name attributes on inputs. You should add them to retrieve the values from the $_POST supergrobal

Jamus Over a year ago

Gah, I made a typo haha. That's why it wasn't working. Thanks very much once again :)

Collectives™ on Stack Overflow

Sending JavaScript Variable to PHP via POST

1 Answer 1

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related